// setting.cpp - v1.0
/*
 *  Copyright (c) 2007 Leigh Johnston.
 *
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are
 *  met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *
 *     * Neither the name of Leigh Johnston nor the names of any
 *       other contributors to this software may be used to endorse or
 *       promote products derived from this software without specific prior
 *       written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 *  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 *  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 *  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 *  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <neolib/neolib.hpp>
#include <neolib/setting.hpp>

namespace neolib
{
    void setting::set(const i_simple_variant& aNewValue)
    {
        if (iValue != aNewValue)
        {
            if (iValue.empty())
                iValue = aNewValue;
            else if (iNewValue != aNewValue)
            {
                iNewValue = aNewValue;
                iManager.setting_changed(*this);
            }
        }
        else if (!iNewValue.empty())
        {
            iNewValue = none;
            iManager.setting_changed(*this);
        }
    }

    bool setting::apply_change() 
    { 
        if (!iNewValue.empty())
        {
            iValue = iNewValue;
            iNewValue = none;
            iManager.setting_changed(*this);
            return true;
        }
        return false;
    }
    
    bool setting::discard_change() 
    { 
        if (!iNewValue.empty())
        {
            iNewValue = none;
            iManager.setting_changed(*this);
            return true;
        }
        return false;
    }
}
